Magnetohydrodynamic Mode Coupling in the Quiet-Sun Network
D. Shaun Bloomfield (Queen's University Belfast)
R. T. James McAteer (NASA Goddard Space Flight Center, Solar Physics Branch)
M. Mathioudakis (Queen's University Belfast)
High-cadence, multiwavelength optical observations were taken at the National Solar Observatory/Sacramento Peak. A total of fifteen network bright points (NBPs) have been studied at differing atmospheric heights, using images taken in narrow wavebands. Wavelet analysis was used to study wavepackets, and identify traveling magnetohydrodynamic waves. Wave speeds were estimated through temporal cross-correlation of signals, in selected frequency bands of wavelet power, in each wavelength. Seven mode-coupling cases were identified, one in each of seven of the NBPs. MHD mode coupling is a viable mechanism for transport of energy from the photosphere into the chromosphere, where subsequent deposition can contribute to atmospheric heating.